ICD-10-CM > M00-M99 > M45-M49 > M48 > M48.4 > M48.40 M48.40 Fatigue fracture of vertebra, site unspecified Non-Billable/Non-Specific Codes M48.40XA..., initial encounter for fractureM48.40XD..., subsequent encounter for fracture with routine healingM48.40XG..., subsequent encounter for fracture with delayed healingM48.40XS..., sequela of fracture